A method and system for controlling deoxygenation in a deaerator

Abstract

This invention discloses a system for controlling the deoxygenation of a deaerator, including a host computer (1), a new water addition pipeline (2), a return water pipeline (3), a mixer (4), a deaerator (5), and an alarm module (6). The input end of the mixer (4) is connected to the new water inlet pipeline (2) and the return water pipeline (3). The water mixed by the mixer (4) flows into the deaerator (5) for deoxygenation and then flows into the water system (7) for use by the water system (7). The water in the water system (7) enters the mixer (4) through the return water pipeline (4). The host computer (1) is connected to the mixer (4), the deaerator (5), and the alarm module (6) for data communication, thereby realizing the monitoring and control of the mixer (4), the deaerator (5), and the alarm module (6) by the host computer (1). This application introduces hot exhaust gas from the boiler into the heat exchange system and preheats the mixed water, thereby increasing the water temperature. This saves fuel for subsequent deaerator heating, achieving cost savings and energy conservation and emission reduction.

Description

Technical Field

[0001] This invention relates to the field of automatic control technology, and in particular to a method and system for controlling the deoxygenation of a deaerator. Background Technology

[0002] In industries that utilize hot water, such as boilers, power plants, and printing and dyeing factories, hot water is essential. However, when hot water is used in pipes or heated containers, the dissolved oxygen in the water creates a strong oxidizing agent. Prolonged exposure to this oxygen can cause an oxidation reaction on the boiler's surface, leading to corrosion of the equipment. Therefore, there is a need for water with very low oxygen content to supply these hot water systems, reducing oxidation and corrosion and protecting the equipment. While standard purified water meets these requirements, its high cost in large quantities necessitates a solution. This leads to the development of deoxygenation technologies. Deoxygenation devices typically deoxygenate conventional water by utilizing the principle that the solubility of oxygen in water decreases as temperature increases, thus using heating to remove oxygen. For example, patent application CN116464959A discloses a method and system for controlling deoxygenation in a deaerator. This method includes: pre-treating the water stored in the condensate tank and then introducing it into the deaerator; turning on the deaerator tower to introduce steam into the deaerator to deoxygenate the water in the deaerator; adjusting the state of the heating device inside the deaerator according to the temperature; adjusting the power of the heating device according to the comparison between the real-time temperature and the preset temperature; adjusting the opening of the exhaust valve according to the comparison between the oxygen content and the preset threshold; and correcting the opening of the exhaust valve according to the real-time flow rate. Patent application CN 106996556A discloses a built-in headless high-pressure deaerator, comprising a cylinder, inside which are installed an inner cylinder, a water spray inner cylinder, a reboiler, a steam mixing outer cylinder, a heating steam pipe, a reboiling heating pipe, and a deoxygenated water outlet; a water supply pipe, a water return pipe, and an exhaust pipe are provided on the cylinder surrounded by the inner cylinder, and a spray device and a packing layer are also provided inside the inner cylinder from top to bottom;

[0003] Patent application CN116255612A discloses a dual-tower energy-saving deaerator and deaeration method, including a deaeration water tank, a first deaeration tower, a second deaeration tower, a flash tank, a water-to-water heat exchanger, a first regulating valve, a second regulating valve, a third regulating valve, a fourth regulating valve, a fifth regulating valve, a sixth regulating valve, a check valve, a seventh regulating valve, a first temperature transmitter, a first level gauge, and a first pressure transmitter. This invention employs dual-tower deaeration, removing oxygen and non-condensable gases from the water through the first deaeration tower, and preheating the deionized water and separating oxygen and other non-condensable gases through the second deaeration tower, creating conditions to recover low-quality exhaust steam that cannot be utilized by existing venting systems. Meanwhile, corresponding control technologies exist for deaerator control to achieve better deaeration performance. For example, patent application CN103970013A discloses a method for implementing deaerator control based on genetic algorithm and fuzzy control, including: analyzing the structure and operating characteristics of the boiler deaerator and establishing a mathematical model of the boiler deaerator control system; designing the structure of the fuzzy PID control system and determining the control parameters of the fuzzy PID control system; optimizing the control parameters using a genetic algorithm; establishing an object model of the boiler deaerator control system in the industrial control configuration software based on the mathematical model of the boiler deaerator control system; developing fuzzy PID control elements and genetic algorithm elements in the configuration software; implementing the control strategy of the boiler deaerator using fuzzy PID control elements, genetic algorithm elements, conventional control elements, and the object model; completing simulation calculations and analyzing simulation results. The genetically optimized fuzzy PID control algorithm of this invention is integrated into the configuration software in the form of elements, which greatly improves the real-time performance of advanced control strategies in online operation.

[0004] Therefore, many technologies have been developed for deaerators and deaeration control to improve deaeration quality and achieve precise control. However, the following issues still need to be addressed regarding the composition and cost optimization of deaeration systems:

[0005] 1. In the current technology, in the field of hot water utilization, there are usually boilers for heating water. These boilers typically use coal combustion to heat water to produce hot water. However, the waste gas resources generated by the boilers are usually not utilized but are directly discharged into the atmosphere. This wastes a lot of heat energy. At the same time, the heat energy required by the deaerator needs to be provided by an additional heat source. This leads to increased costs due to the need for an additional heat source, while also resulting in wasted heat. In terms of data processing, there is no effective and fast method to quickly train the data to train the model.

[0006] 2. In the existing technology, deaerators usually only use heating to remove oxygen from water. The oxygen is discharged together with the steam. However, heating the water will cause the pressure to increase, which is not conducive to the separation of oxygen and water, and thus cannot efficiently remove oxygen.

[0007] 3. In the prior art, the joint linkage relationship of the various subsystems in the deaerator is not considered when the deaerator is performing deoxygenation operation, which makes the deoxygenation process unstable. In particular, the pressure reduction required is different when the water temperature is heated to different temperatures, and the heating temperature required is also different when the water pump supply is different, but this is not taken into consideration in the prior art.

[0008] In response to the aforementioned technical problems, the desire to provide a low-cost, high-quality deaerator control system and method has become a pressing issue. Therefore, this application proposes a method and system for controlling deaerator deoxygenation to solve the aforementioned technical problems. Summary of the Invention

[0009] The purpose of this invention is to provide a method and system for controlling the deoxygenation of a deaerator.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a system for controlling deaeration in a deaerator, comprising a host computer, a fresh water addition pipeline, a return water pipeline, a mixer, a deaerator, and an alarm module. The input end of the mixer is connected to the fresh water inlet pipeline and the return water pipeline. Water mixed by the mixer flows into the deaerator for deaeration and then flows into the water supply system for use by the water supply system. Water passing through the water supply system enters the mixer through the return water pipeline. The host computer is connected to the mixer, the deaerator, and the alarm module for data communication, thereby enabling the host computer to monitor and control the mixer, the deaerator, and the alarm module.

[0011] The deaerator is characterized by the following features: it includes a heat exchange system, a pressure reduction system, a pressure detection module, and an oxygen content detection module; the host computer is connected to the heat exchange system, the pressure reduction system, the pressure detection module, and the oxygen content detection module via data communication to monitor and control them; the heat exchange system and the pressure reduction system are connected sequentially in the deaerator; the oxygen content detection module is used to detect the oxygen content of the water after treatment by the pressure reduction system; thus, the newly introduced water and the returned water, after being mixed, flow sequentially through the heat exchange system and the pressure reduction system; wherein, the heat exchange system is connected to the heated exhaust gas from the boiler;

[0012] During deoxygenation, the mixer output is connected to a heat exchange system, through which the mixed water flows. Simultaneously, the hot exhaust gas generated by the boiler combustion flows through the heat exchange system, thereby achieving heat exchange between the hot exhaust gas and the mixed water to heat the water. The heated water then flows through a pressure reducing system to depressurize the oxygen and separate the water. The oxygen is then discharged through an exhaust system, while the treated water, after the oxygen is discharged, enters a water supply system for use. When water needs to be recycled, it returns to the mixer via a return pipeline.

[0013] If the oxygen content in the water detected by the oxygen content detection module exceeds the threshold for a certain period of time, an alarm will be triggered by the alarm module to remind personnel to carry out maintenance in a timely manner.

[0014] Preferably, a heating system is also provided between the pipelines of the heat exchange system and the pressure reducing system. The heating system is connected to the host computer via data communication, so that the host computer controls the heating system to heat the water flowing through the heat exchange system to a suitable temperature.

[0015] Preferably, the pressure reduction system further includes a water temperature detection module and an exhaust pump. The water temperature detection module acquires the water temperature T of the heated water, and the exhaust pump is connected to the treatment tank to provide negative pressure by evacuating the treatment tank. Its power is Pt, where Pt = k * 1 / T, and k is a constant.

[0016] Preferably, the water flows through the pressure reducing system and then through the three-way valve. When the oxygen content detection module detects that the water meets the water demand of the water system, the three-way valve is activated to allow the water to flow into the water system for supply. If the water does not meet the water demand of the water system, the three-way valve is controlled to return the water to the heat exchange system for deoxygenation again.

[0017] Preferably, the new water addition pipeline is also connected to a flow pump, which is connected to the host computer to realize the control of the water delivery power Pf of the flow pump through the host computer; wherein the water delivery power Pf = k2*Pt / T, where k2 is a constant.

[0018] Preferably, the oxygen content detection module retrieves the oxygen content v in the water and sends it to the host computer. The host computer adjusts the heating power Ph of the heating system based on the detected oxygen content v and sends it to the heating system to adjust the heating power Ph, where Ph = k3 * 1 / v, and k3 is a constant.

[0019] Preferably, when the host computer controls the flow pump, the pressure reducing system, and the heating system, it first monitors whether the water volume Q produced by the deaerator meets the demand. When the water volume Q is lower than the demand, the water delivery power Pf of the flow pump is increased to meet the water delivery volume. At the same time, the heating system and the pressure reducing system are controlled to work so as to produce water with the required oxygen content.

[0020] On the other hand, this application also provides a method for controlling deoxygenation in a deaerator, including controlling the deaerator deoxygenation system, comprising the following steps:

[0021] Step S1: The host computer collects the water delivery power Pf, the power Pt of the exhaust pump, the pressure P detected by the pressure detection module, the temperature T of the water flowing through the pressure reduction system, and the oxygen content v in the water obtained by the oxygen content detection module.

[0022] Step S2: When the water volume Q is lower than the required volume, the water delivery power Pf of the flow pump is increased to meet the water delivery volume. At the same time, the heating system and the pressure reducing system are controlled to operate so as to produce water with the required oxygen content. The flow pump is connected to the host computer so that the water delivery power Pf of the flow pump can be controlled by the host computer. Wherein the water delivery power Pf = k2*Pt / T, and k2 is a constant.

[0023] Step S3: The oxygen content detection module retrieves the oxygen content v in the water and sends it to the host computer. The host computer adjusts the heating power Ph of the heating system based on the detected oxygen content v and sends it to the heating system to adjust the heating power Ph, where Ph = k3 * 1 / v, and k3 is a constant.

[0024] Step S4: If the amount of water that meets the requirements after treatment by the deaerator is lower than the demand of the water system, then stop reducing the water supply power Pf. The water temperature detection module obtains the water temperature T of the heated water. The exhaust pump is connected to the treatment tank and provides negative pressure by evacuating the treatment tank. Its power is Pt, where Pt = k * 1 / T, and k is a constant.

[0025] Step S5: When the water volume Q produced by the deaerator meets the requirements but the oxygen content v does not meet the requirements, the host computer only increases the power Ph of the heating system and / or the power Pt of the pressure reducing system. When the water volume Q produced by the deaerator exceeds the requirements, the water delivery power Pf is reduced.

[0026] Step S6: When the oxygen content detection module detects that the water meets the water demand of the water system, the three-way valve is activated to allow the water to flow into the user system for water supply. If the water does not meet the water demand of the water system, the three-way valve is controlled to return the water to the heat exchange system for deoxygenation again.

[0027] Preferably, a solar water heater is installed between the mixer and the heat exchange system to preheat the water passing through the mixer.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. In this application, the hot exhaust gas from the boiler is introduced into the heat exchange system and preheated with the mixed water to increase the water temperature, thereby saving fuel for subsequent deaerator heating, achieving cost savings and energy conservation and emission reduction; at the same time, reducing the exhaust gas temperature can also better protect the environment.

[0030] 2. In order to further improve the deoxygenation efficiency, the deaerator of this application is also equipped with a pressure reduction system, which depressurizes the heated water by evacuating and reducing the pressure, thereby allowing the oxygen in the water to be separated more quickly.

[0031] 3. In this application, a host computer is set up so that the host computer can simultaneously obtain water pump power data, water heating temperature and pressure reduction data, etc., and comprehensively consider them, so as to make each subsystem work stably by finely adjusting each parameter and producing stable deoxygenated water. Attached Figure Description

[0032] Figure 1 A schematic diagram of the deaerator deoxygenation system and control method;

[0033] Figure 2 Example 1: Control of a deaerator deoxygenation system and control method;

[0034] Figure 3 Example 1: Control of a deaerator deoxygenation system and control method.

[0035] The following are the annotations in the attached diagram: 1. Host computer; 2. Fresh water addition pipeline; 3. Return water pipeline; 4. Mixer; 5. Deaerator; 6. Alarm module; 7. Water system; 8. Heat exchange system; 9. Pressure reducing system; 10. Pressure detection module; 11. Oxygen content detection module; 12. Boiler; 13. Heating system; 14. Three-way valve; 15. Flow pump. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Specific Implementation Example 1:

[0038] like Figure 1 As shown, a system for controlling deaeration in a deaerator includes a host computer 1, a fresh water inlet pipeline 2, a return water pipeline 3, a mixer 4, a deaerator 5, and an alarm module 6. The input end of the mixer 4 is connected to the fresh water inlet pipeline 2 and the return water pipeline 3. Water mixed by the mixer 4 flows into the deaerator 5 for deaeration and then flows into the water supply system 7 for use by the water supply system 7. Water from the water supply system 7 enters the mixer 4 through the return water pipeline 4. The host computer 1 is connected to the mixer 4, the deaerator 5, and the alarm module 6 via data communication, thereby enabling the host computer 1 to monitor and control the mixer 4, the deaerator 5, and the alarm module 6.

[0039] The deaerator 5 includes a heat exchange system 8, a pressure reduction system 9, a pressure detection module 10, and an oxygen content detection module 11. The host computer 1 is connected to the heat exchange system 8, the pressure reduction system 9, the pressure detection module 10, and the oxygen content detection module 11 via data communication to monitor and control them. The heat exchange system 8 and the pressure reduction system 9 in the deaerator 5 are connected in sequence. The oxygen content detection module 11 is used to detect the oxygen content of the water after it has been treated by the pressure reduction system 11. Thus, the newly introduced water and the return water, after being mixed, flow sequentially through the heat exchange system 8 and the pressure reduction system 9. The heat exchange system 8 is connected to the heated exhaust gas from the boiler 12.

[0040] During deoxygenation, the output of the mixer 4 is connected to a heat exchange system 8, through which the mixed water flows. Simultaneously, the hot exhaust gas generated by the boiler combustion flows through the heat exchange system 8, allowing heat exchange between the hot exhaust gas and the mixed water to heat the water. The heated water then flows through a pressure reducing system 9 to separate the oxygen and water, and the oxygen is discharged through an exhaust system. The treated water, after the oxygen is discharged, enters a water supply system 7 for use by the water supply system 10. When water from the water supply system 10 needs to be recycled, it returns to the mixer 4 via a return pipeline 3. The heat exchange rate of the water is calculated using the following formula:

[0041] R=M water ×b water ×(T wout -T win )

[0042] Where R represents the heat exchange quantity, M water b represents the mass flow rate of water. water T represents the specific heat capacity of water. wout T represents the outlet temperature of the water. win This indicates the inlet temperature of the water.

[0043] When the oxygen content in the water obtained by the oxygen content detection module 11 exceeds the threshold for a certain period of time, an alarm will be triggered by the alarm module 10 to remind personnel to carry out maintenance in a timely manner.

[0044] Preferably, a heating system 13 is also provided between the pipelines of the heat exchange system 8 and the pressure reducing system 9. The heating system 13 is connected to the host computer 1 for data communication, so that the host computer 1 controls the heating system 13 to heat the water flowing through the heat exchange system 8 to a suitable temperature.

[0045] Preferably, the pressure reduction system 9 further includes a water temperature detection module and an exhaust pump. The water temperature detection module acquires the water temperature T of the heated water, and the exhaust pump is connected to the treatment tank to provide negative pressure by evacuating the treatment tank. Its power is Pt, where Pt = k * 1 / T, and k is a constant.

[0046] Preferably, the water flows through the pressure reducing system 9 and then through the three-way valve 14. When the oxygen content detection module 9 detects that the water meets the water demand of the water supply system 7, the three-way valve is activated to supply water into the water supply system 7. If the water does not meet the water demand of the water supply system 7, the three-way valve is controlled to return the water to the heat exchange system 8 for deoxygenation again.

[0047] Preferably, the new water addition pipeline 2 is also connected to a flow pump 15, which is connected to the host computer 1 to realize the control of the water delivery power Pf of the flow pump 15 through the host computer 2; wherein the water delivery power Pf = k2*Pt / T, where k2 is a constant.

[0048] Preferably, the oxygen content detection module 11 retrieves the oxygen content v in the water and sends it to the host computer 1. The host computer 1 adjusts the heating power Ph of the heating system 13 based on the detected oxygen content v and sends it to the heating system 13 to adjust the heating power Ph, where Ph = k3 * 1 / v, and k3 is a constant.

[0049] Preferably, the deoxygenation efficiency of the deaerator is analyzed. When the water volume Q produced by the deaerator 5 meets the requirements but the oxygen content v does not meet the requirements, the host computer 1 only increases the power Ph of the heating system 13 and / or the power Pt of the pressure reducing system 9 according to the deoxygenation efficiency. When the water volume Q produced by the deaerator 5 exceeds the requirements, the water delivery power Pf is reduced. The deoxygenation efficiency is calculated using the following formula:

[0050]

[0051] Where u represents the deoxygenation efficiency, P j P represents the initial heating power. h P represents the heating power when adjusted to the heating system. f P represents the water conveyance capacity. t Q represents the pressurization power, Q represents the amount of water produced, v represents the oxygen content in the water obtained by the oxygen content detection module, and v0 represents the initial oxygen content.

[0052] Furthermore, the initial heating power is calculated using the following formula:

[0053]

[0054] Among them, P j The initial heating power is represented by m, the mass of water flowing through the heating system per unit time is represented by b, and the specific heat capacity of water is represented by T. h The temperature is indicated when the system is adjusted to the heating system, T0 represents the initial temperature, and Δt represents the time interval.

[0055] Preferably, when the host computer 1 controls the flow pump 15, the pressure reducing system 9, and the heating system 13, it first monitors whether the water volume Q produced by the deaerator 5 meets the demand. When the water volume Q is lower than the demand, the water delivery power Pf of the flow pump 15 is increased to meet the water delivery volume. At the same time, the heating system 13 and the pressure reducing system 9 are controlled to work so as to produce water with the required oxygen content. Specific Implementation Example 2

[0057] A method for controlling deoxygenation in a deaerator includes controlling the deaerator deoxygenation system, comprising the following steps:

[0058] Step S1: The host computer 1 collects the water delivery power Pf, the power Pt of the exhaust pump, the pressure P detected by the pressure detection module 1, the temperature T of the water flowing through the pressure reduction system, and the oxygen content v in the water obtained by the oxygen content detection module 11.

[0059] Step S2: When the water volume Q is lower than the required volume, the water delivery power Pf of the flow pump 15 is increased to meet the water delivery volume. At the same time, the heating system 13 and the pressure reducing system 9 are controlled to operate so as to produce water with the required oxygen content. The flow pump 15 is connected to the host computer 1 so that the water delivery power Pf of the flow pump 15 can be controlled by the host computer 2. Wherein the water delivery power Pf = k2*Pt / T, and k2 is a constant.

[0060] Step S3: The oxygen content detection module 11 retrieves the oxygen content v in the water and sends it to the host computer 1. The host computer 1 adjusts the heating power Ph of the heating system 13 based on the detected oxygen content v and sends it to the heating system 13 to adjust the heating power Ph, where Ph = k3 * 1 / v, and k3 is a constant.

[0061] Step S4: The water temperature detection module obtains the water temperature T of the heated water. The exhaust pump is connected to the treatment tank and provides negative pressure by evacuating the treatment tank. Its power is Pt. If the amount of water that meets the requirements after treatment by the deaerator 5 is lower than the demand of the water system, the reduction of the water supply power Pf is stopped. The power Pt of the exhaust pump is adjusted by adjusting the power Pt, Pt = k * 1 / T, where k is a constant.

[0062] Step S5: Analyze the deoxygenation efficiency of the deaerator. When the water volume Q produced by the deaerator (5) meets the requirements but the oxygen content v does not meet the requirements, the host computer (1) only increases the power Ph of the heating system (13) and / or the power Pt of the pressure reducing system (9) according to the deoxygenation efficiency. When the water volume Q produced by the deaerator (5) exceeds the requirements, the water supply power Pf is reduced. The deoxygenation efficiency is calculated by the following formula:

[0063]

[0064] Where u represents the deoxygenation efficiency, P j P represents the initial heating power. h P represents the heating power when adjusted to the heating system. f P represents the water conveyance capacity. t Q represents the pressurization power, Q represents the amount of water produced, v represents the oxygen content in the water obtained by the oxygen content detection module, and v0 represents the initial oxygen content.

[0065] Step S6: When the oxygen content detection module 9 detects that the water meets the water demand of the water system 7, the three-way valve is activated to supply water into the user system 7. If the water does not meet the water demand of the water system 7, the three-way valve is controlled to return the water to the heat exchange system 8 for deoxygenation again.

[0066] Preferably, a solar water heater is installed between the mixer 4 and the heat exchange system 8 to preheat the water passing through the mixer 4.

[0067] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A system for controlling deaeration of a deaerator, comprising a host computer (1), a new water inlet pipeline (2), a return water pipeline (3), a mixer (4), a deaerator (5), and an alarm module (6). The input end of the mixer (4) is connected to the new water inlet pipeline (2) and the return water pipeline (3). Water mixed by the mixer (4) flows into the deaerator (5) for deaeration and then flows into a water system (7) for use by the water system (7). Water from the water system (7) enters the mixer (4) through the return water pipeline (3). The host computer (1) is connected to the mixer (4), the deaerator (5), and the alarm module (6) for data communication, thereby enabling the host computer (1) to monitor and control the mixer (4), the deaerator (5), and the alarm module (6). Its features are: The deaerator (5) includes a heat exchange system (8), a pressure reduction system (9), a pressure detection module (10), and an oxygen content detection module (11). The host computer (1) is connected to the heat exchange system (8), the pressure reduction system (9), the pressure detection module (10), and the oxygen content detection module (11) for data communication to monitor and control them. The heat exchange system (8) and the pressure reduction system (9) in the deaerator (5) are connected in sequence. The oxygen content detection module (11) is used to detect the oxygen content of the water after it has been treated by the pressure reduction system (9). The newly added water and the return water are mixed and flow through the heat exchange system (8) and the pressure reduction system (9) in sequence. The heat exchange system (8) is connected to the hot exhaust gas of the boiler (12). During the deoxygenation operation, the output end of the mixer (4) is connected to a heat exchange system (8), so the mixed water flows through the heat exchange system (8). At the same time, the hot exhaust gas generated by the boiler combustion flows through the heat exchange system (8), so that the hot exhaust gas and the mixed water can exchange heat to heat the water. The heated water flows through the pressure reducing system (9) to reduce the pressure so that the oxygen and the water are separated. The oxygen is discharged through the exhaust system. At the same time, the treated water enters the water system (7) after the oxygen is discharged for use by the water system (7). When the water after passing through the water system (7) needs to be recycled, it flows back to the mixer (4) through the return water pipeline (3). When the oxygen content of the water obtained by the oxygen content detection module (11) exceeds the threshold for a certain period of time, an alarm is triggered by the alarm module (6) to remind personnel to carry out maintenance in a timely manner. A heating system (13) is also provided between the pipelines of the heat exchange system (8) and the pressure reducing system (9). The heating system (13) is connected to the host computer (1) via data communication, so that the host computer (1) controls the heating system (13) to heat the water flowing through the heat exchange system (8) to a suitable temperature. The oxygen content detection module (11) retrieves the oxygen content v in the water and sends it to the host computer (1). The host computer (1) adjusts the heating power Ph of the heating system (13) based on the detected oxygen content v and sends it to the heating system (13) to adjust the heating power Ph, where Ph = k3 1 / v, where k3 is a constant.

2. The system for controlling deoxygenation in a deaerator according to claim 1, characterized in that, The pressure reduction system (9) also includes a water temperature detection module and an exhaust pump. The water temperature detection module acquires the water temperature T of the heated water. The exhaust pump is connected to the treatment tank and provides negative pressure by evacuating the treatment tank. Its power is Pt, where Pt = k 1 / T, where k is a constant.

3. The system for controlling deoxygenation in a deaerator according to claim 1, characterized in that, After the water flows through the pressure reducing system (9), it flows through the three-way valve (14) again. When the oxygen content detection module (11) detects that the water meets the water demand of the water system (7), the three-way valve will operate to supply water into the water system (7). If the water supply does not meet the water demand of the water system (7), the three-way valve will control the water to flow back to the heat exchange system (8) for deoxygenation again.

4. The system for controlling deoxygenation in a deaerator according to claim 2, characterized in that, The new water inlet pipeline (2) is also connected to a flow pump (15), which is connected to the host computer (1) to realize the control of the water delivery power Pf of the flow pump (15) through the host computer (1); wherein the water delivery power Pf = k2 Pt / T, where k2 is a constant.

5. The system for controlling deoxygenation in a deaerator according to claim 4, characterized in that, When the amount of water Q produced by the deaerator (5) meets the requirements but the oxygen content v does not meet the requirements, the host computer (1) only increases the power Ph of the heating system (13) and / or the power Pt of the pressure reducing system (9). When the amount of water Q produced by the deaerator (5) exceeds the requirements, the water supply power Pf is reduced.

6. The system for controlling deoxygenation in a deaerator according to claim 4 or 5, characterized in that, When the host computer (1) controls the flow pump (15), the pressure reducing system (9) and the heating system (13), it first monitors whether the water volume Q produced by the deaerator (5) meets the demand. When the water volume Q is lower than the demand, the water delivery power Pf of the flow pump (15) is increased to meet the water delivery volume. At the same time, the heating system (13) and the pressure reducing system (9) are controlled to work so as to produce water with the required oxygen content.

7. A method for controlling deoxygenation in a deaerator, comprising the system for controlling deoxygenation in a deaerator as described in claim 6, characterized in that, Includes the following steps: Step S1, the host computer (1) collects the water delivery power Pf, the power Pt of the exhaust pump, the pressure P detected by the pressure detection module (10), the temperature T of the water flowing through the pressure reduction system, and the oxygen content v in the water obtained by the oxygen content detection module (11). Step S2: When the water volume Q is lower than the required volume, the water delivery power Pf of the flow pump (15) is increased to meet the water delivery volume. At the same time, the heating system (13) and the pressure reducing system (9) are controlled to operate so as to produce water with the required oxygen content. The flow pump (15) is connected to the host computer (1) so that the host computer (1) can control the water delivery power Pf of the flow pump (15). Wherein the water delivery power Pf = k2 Pt / T, where k2 is a constant; Step S3: The oxygen content detection module (11) retrieves the oxygen content v in the water and sends it to the host computer (1). The host computer (1) adjusts the heating power Ph of the heating system (13) based on the detected oxygen content v and sends it to the heating system (13) to adjust the heating power Ph, where Ph = k3 1 / v, where k3 is a constant; Step S4: The water temperature detection module acquires the water temperature T after heating. The exhaust pump is connected to the treatment tank to provide negative pressure by evacuating the treatment tank. If the amount of water that meets the requirements after treatment by the deaerator (5) is lower than the demand of the water system, the reduction of the water supply power Pf is stopped. The power Pt of the exhaust pump is adjusted by adjusting the power Pt, where Pt = k 1 / T, where k is a constant; Step S5: Analyze the deoxygenation efficiency of the deaerator. When the water volume Q produced by the deaerator (5) meets the requirements but the oxygen content v does not meet the requirements, the host computer (1) will only increase the power Ph of the heating system (13) and / or the power Pt of the pressure reducing system (9) according to the deoxygenation efficiency. When the water volume Q produced by the deaerator (5) exceeds the requirements, the water delivery power Pf will be reduced. Step S6: When the oxygen content detection module (11) detects that the oxygen content v of the water meets the water demand of the water system (7), the three-way valve is activated to supply water into the water system (7). If the oxygen content v of the water does not meet the water demand of the water system (7), the three-way valve is controlled to return the water to the heat exchange system (8) for deoxygenation again.

8. A method for controlling deoxygenation in a deaerator according to claim 7, characterized in that: A solar water heater is installed between the mixer (4) and the heat exchange system (8). The water passing through the mixer (4) is preheated by the solar water heater.

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